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ANPEC - Synchronous Step-Down Converter

Numéro de référence APW7083
Description Synchronous Step-Down Converter
Fabricant ANPEC 
Logo ANPEC 





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APW7083 fiche technique
APW7083
5A, 26V, 380kHz, Synchronous Step-Down Converter
Features
General Description
Wide Input Voltage from 4.5V to 26V
Output Current Up to 5A
Adjustable Output Voltage from 0.8V to 90%V
IN
- 0.8V Reference Voltage
- ±2.5% System Accuracy
Integrated 50mP-Channel Power MOSFET and
20mN-Channel Power MOSFET
High Efficiency up to 95%
Current-Mode Operation
- Stable with Ceramic Output Capacitors
- Fast Transient Response
Power-On-Reset Monitoring
Fixed 380kHz Switching Frequency in PWM Mode
Automatic Pulse-Skipping Mode (PSM)/PWM
Mode Operation
Built-in Digital Soft-Start
Output Current-Limit Protection with Frequency
Foldback
70% Under-Voltage Protection
Over-Temperature Protection
118% Over-Voltage Protection
<5µA Quiescent Current During Shutdown
Thermal-Enhanced TQFN5x6-28 Package
Pb-Free Available as an Option
Lead Free and Green Devices Available
(RoHS Compliant)
Applications
LCD Monitor / TV
SetTop Box
Portable DVD
Wireless LAN
ADSL, Switch HUB
Notebook Computer
Step-Down Converters Requiring High Efficiency
and 5A Output Current
The APW7083 is a 5A, synchronous, step-down converter
with integrated 50mP-channel power MOSFET and
20mN-channel power MOSFET. The device, with cur-
rent-mode control scheme, can convert 4.5~26V input volt-
age to the output voltage adjustable from 0.8 to 90% VIN to
provide excellent output voltage regulation.
The APW7083 regulates the output voltage in an auto-
matic PSM/PWM mode operation, depending on the out-
put current, for high efficiency operation over light to full
load current. The APW7083 is also equipped with power-
on-reset, soft-start, and whole protections (including over-
voltage, under-voltage, over-temperature, and current-
limit) in a single package. In shutdown mode, the supply
current drops below 5µA.
This device, available in 28-pin TQFN5x6 package, pro-
vides a very compact system solution with minimal exter-
nal components and good thermal conductance.
Simplified Application Circuit
C1
10µF
VIN
4.5V~26V
C3
1µF
R5
100k
VIN
VIN
VCC UGND
LX
U1 ZCS
APW7083
EN PGND
COMP FB
R4 GND
R2
C6 1%
C5
C2
1µF L1
5A
R1
1%
C7
(Optional)
VOUT
0.8V~90%VIN, 5A
C4
22µF
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Sep., 2011
1
www.anpec.com.tw
Free Datasheet http://www.datasheetlist.com/

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